The Southern Assemblage: After
(p.47), AMOCO Seminar on Stratigraphic Principles.

This assemblage dominates a large area in southern
Florida Bay where there is wide access through the Upper Keys to the
reef tract. The main elements are not common in either the Gulf or Open
Reef Tract Assemblages, and this assemblage may reflect the northern
edge of an association more characteristic of the Lower Keys than of
the Bay.